Malicious PDF — malware analysis report

Static analysis result for SHA-256 1572b60bb981a8f8…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 04:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6612b4c5e11e40d0c905235e295f235f SHA-1: 736b562629cb3aecad2ca614f2c86ef51e221c8c SHA-256: 1572b60bb981a8f8ed38ee458e3f7f617427807ad02dedf180bb623603436cac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'family tree template editable' and the URL itself. The presence of numerous Shopify links, while many are benign, suggests a link farm tactic to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=blank+family+tree+template+editable
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/6487/9256/files/nitrogen_fixation_by_rhizobium_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/logiposabebozewo.pdf
    • https://cdn.shopify.com/s/files/1/0462/7736/1813/files/oxford_picture_dictionary_second_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0437/3194/3585/files/25933765044.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/53424526216.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/jorozikale.pdf
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/exercises_for_lateral_epicondylitis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/miribaxetuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/patofisiologi_bronkopneumonia.pdf
    • https://cdn.shopify.com/s/files/1/0462/2788/2133/files/4833667767.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/kuxekesep.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/excel_formula_to_convert_number_to_words_in_rupees.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/94422577433.pdf
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/57290285128.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/pefinozudupajanasuvexavum.pdf
    • https://cdn.shopify.com/s/files/1/0439/1711/5547/files/6893522998.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007416.bin
d6db19f0277b8c2ea6a8ef6e9880437d6daee1299cc255b852290d1bb9ab2a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7416 5364 bytes
font_01_sfnt_off0000863e.bin
66077c871d56fb54529cf2e0e2a6ba16634fd2141db54fda6cce63858586a34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863E 10008 bytes

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